Calculating-machine.



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APPLIOATION FILED SBPT.12, 1910.

H. GORDT.

GALGULATING MACHINE.

Patented Dec. 17, 1912.

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H. GORDT.

CALCULATING MACHINE.

APPLIOATION 11u31) s211212, 1910.

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APPLIUATION FILED SEPT. 12, 1910.

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HUGO GOBDT, OFNOBDENHAI'I, GERMANY.

emma-MACHINE.

Application mea september 1a, 1910. semi No. sarees'.

To all whom it may concern:

Be it known that I, Huso Comu', asubof the Grand Duke of Oldenburg,residing at Nordenham, Grand Duchy of Oldenburg, Germany, have inventedcertain new and useful Im rovements in Calculating-Machines, of-w "chthe following is a specification. v

This invention relates to a calculating machine 'having nine drivingcylinders correspondmg to the numbers, one to nine, said cylindersrepresenting each the results of the multiplications of the numbers 1 to9.

The invention has for its object to improve the construction of thecalculating machine in such a manner that although the same is verysimple and easy to mani ulate, any kind of calculations can be e ected.With this improved calculating machine the shift-ing of the calculatingwheels is eifected automatically so that it is merely necessary to turnthe crank handle 1 for any different calculating operations to beexecuted.- All the mechanisms for the transmitting motion returnautomatically to the normal position after the calculating operation hasbeen executed.

The improved calculatin machine is shown by way of example in t eaccompanyingvdrawings.

igure 1 is a lan view of .the calculating machine, the lid) or top,plate being partly removed. Fi 2 is a section on line A, B, C, D, E, F,of Fig. 1. Fig. 3 is a section on line H-I of Fig. 1. Figs. 4 and 5 showthe cylinder surfaces.

The calculating machine comprises multiplicating cylinders upon whichthe results of the multiplications of the numbers 1 to 9 are representedby teeth (Fig. 4). The cylinder 1 shows the results of themultiplications with the number 1 as multiplicator, cylinder 2 those ofthe multiplication with the number 2 as multiplicator and so forth. InFig. 4 the cylinders 1, 5, and 9 are shown. The cylinders 1 to 9 mesheach l with a rack 10 (Figs. 2 and 3) the outer ends of which form keys.Above the cylinders 1 to 9 the mechanism for transmitting 4the revolvingmotion of said cylinders is arranged. v'This mechanism consists ofeighteen racks 12 (Figs. 1 and 3) having teeth at both longitudinaledges. Said racks 12 slide upon guide bars 11 (Fig. r3). The

cylinders 1 to 9 can be brought to engagement with said racks 12. Shafts13 of square cross section extend transversely over Vsaid racks (Fig.4l) and carry adjustable toothed wheels 14 (Figs. 1 and 2). Said toothedWheels 14 are arranged in pairs and they are mounted upon a slidingpiece 15 so that each sliding piece carries at the right hand side atoothed wheel-14v for the trans-V mission of the units, and atithe lefthand side a toothed Wheel for the transmission of the tens. Said slidingpieces have hand knobs projecting through the top plate of the machineand they serve for throwing the multiplicand in gear.

The units and tensbeing separately arranged-on the driving cylinders(Fig. 4) the mechanism for the transmission is also divided into racksfor' the units and racks for the tens, havin 4their separate receptionwheels so that as has already been mentioned) the toothed wheel at theright hand end of the sliding piece 15 (Fig. 1) meshes with the rack forthe units, that at the left hand side meshing with the rack for thetens.

If one of the keys is depressed, as No.5 for example, its cylinder 5 isturned to the right and thus moves the racks to the right for thecorresponding number of teeth. This motion is transmitted to thereception Wheels 14 which are put in gear. Suppose the sliding piece forthe multlplicator 7 was, in gear, its reception wheels 'thereforespecification: Letters raient. A Patented Dec.17,1 912.

wouldbe turned, as the driving cylinder 5 1 has been actuated, that forthe units for ve teeth and that for the tens for three teeth,

the mul- Vanism. Thesev receiving wheels 18 are arranged so that thewheel for the tens is mounted upon the same shaft 19 as the nextfollowing wheel for the units, themovement of the wheels for the tensbeing thus combined with the movement of the next following wheels forthe units.

A drum 20 (Figs. 1A, 2, and 3) is arranged below the shafts 19 with thereceiving Wheels 18, said drum having long Iteeth arranged in twogroups, said teeth of different lengths being arranged in the one groupin reverse order to the other group. Thus the transmission from thereceiving wheels 18 is effected successively. The hand crank 21 (Fig. 3)drives, by means ofthe toothed segment 22, the spur wheel 23, the bevel'wheel 24 and the bevel pinions 25 and the drum 20, so that thereceiving Wheels 18 which have been adjusted with regard to said drums20 are turned and transmit their movement by means of the shafts 19 andbeve-l pinions 26, to the bevel wheel 27 of the counting device wherethe result is indicated by the number disks 28 (Figs. 1 and 3.)

The indicating device for the quotient is arranged differently. Itconsists of a spindle 29 with a worm 30, a sliding pusher 3l and areceiving wheel 32 which is continually in engagement with the extremeunit rack 132. This rack is always pushed toward the right for as manyteeth as the depressed key indicates numbers. If therefore the key No. 5is depressed, said rack 12 and consequently the receiving wheel 32 ismoved for tive spaces. accordingly with regard to the drum 20 and whensaid drum is being turned, the corresponding numbers are indicated inthe counting dev1ce by the number disk 39 which is operated from saiddrum by means of the spindle 34 and toothed wheels 35, 36, 37, 38.

From the counting device there can be seen that which is themultiplicator or vthe quotient. v

The invention further concerns the device for automatically returningthe driving cylinders and the other parts of the mechanism to the normalpositions. lfVith this objectin view the toothed segment 22 after havingactuated the toothed Wheel 23 engages with the toothed wheel 40 (Fig. l)and turns, through the intermediary of the cog wheels 41, the spindle42, the toothed wheels 43 and an eccentric disk 44 (Fios. 1 and 2) whichpushes back byl means of the pusher 45 -all the racks and consequentlytheir cylinders.

During this period the eccentric disk 46 (Figs. 1 and 2) lifts thecount-ing device 47 and the cam 48 (Fig. 2) shifts the same for thelength of one space to the right, Whereupon lthe device drops back alongthe eccentric disk 46.

The calculating machine o crates as follows: For multiplication, if orexample 51- has to be multiplied by 27, the multiplicand 51 is put ingear by means of the corresponding sliding pieces 15 and the key 7 1sdepressed. The cylinder 7 being thus revolved shifts to the right thecorresponding racks 12 for the lengths of 7, 14, 21, 28, 35, 42, 49,

' 56, and 63 s aces. Those of the receiving wheels 14 which are putingear are revolved, that is to say, in the present case the pair oftoothed wheels 14 which are adjusted on 1 take up the movement of theracks, that for the tens with zero and that for the units with sevenvalues and the toothed Wheel pair adjusts on number 5 the movements forthree and live teeth respectively. This movement product.

The toothed Wheel 33 is shifted of the receiving wheels 14 istransmitted by theworm 16 and .guide-pieces 17 to the receiving wheels18 of the summing up device. Thus the multiplicator number 1s adjusted.On turning the crank handle 21 the drum 20 is made to revolve and thefollowing product appears:

7|1 equal to 7 plus 7X5 equalto 35 E These numbers are added up so thatthe units and the tens appear on one number disk, and the sum 357appears as the first At the 'second turn of the crank handle 21 theadding up device with the number 357 is shifted for the length of onespace to the right, and at the same time the driving cylinder 7 with itskey is returned to the normal position. Hereupon the key 2 is depressedwhereby the receiving wheels are shifted upon their spindles, and if thecrank handle 21 is being turned the drum 20 adds the result of 2 51 tothe number 357, that is to say:

02 and l0 and the final result is that is to say the product of themultiplication.

The following is an example of addition To sum up 345|491 and 749, thefirst number 345 is marked at the graduations for the multiplicand andthe key 1 is depressed so that the receiving wheels 18 are shifted ontheir spindles according to the product of 1 345. The crank handle isturned again .and the number is registered in the adding device.Hereupon the second number 491 is marked and multiplied by 1 and theresult added up in the adding device with the first number. For thethird number 749 the same procedure is followed. It is evident that theshift-ing device has to be put out of gear for the adding operation.

4For a sum of division one proceeds as follows: The cogwheels 26 areshifted on their spindles 19 so that the number disks 28 turn in theopposite direction as before. Instead of adding the products obtainedthey are subtracted. To divide 357 by 51, the dividend 357 is marked byhand on the counting device and the divisor 51 is marked on themultiplicand graduations so that the divisor can be deducted from thedividend, that is to say, the tensA of the divisor are placed under thetens of the dividend. After having mentally calculated that the divisorcan at the utmost be contained seven times in the dividend, the key 7 isdepressed. If now the crank handle 21 is turned, the products of thedriving cylinder 7 which appear at the same height as the divisor arededucted from the dividend. The quotient device therefore indicates 7.

Thel subtractions are made in the same manner as the additions, only thecogwheels 26 have rst to be shifted on their spindles 19 so that thenumber disks 28 revolve in the opposite direction as before I claim:

An improved calculating machine comprising in combination nine drivingcylinders one for each number, having each the products of themultiplication of the numer which it represents with all the othernumbers marked upon its surface in the form of teeth arranged insuperposed ranges, the units being arranged in separate ranges and thetens as well, the receiving wheels to which the motion of said drivingcylinders is transmitted, racks to be shifted by said driving cylindersand worm s indles connected with said racks and with said receivingwheels, shiftin pushers on said worm spindles for. shi ing saidreceiving .wheels according to the movement of the racks, a drum havingtwo series of teeth arranged in reverse order in the two series, a crankhandle for operating said drum, an adding-up device of convenientconstruction and a transmission between said drum and said adding-updevice, the keys for operating the mechanism, and means for returningthe driving cylinders and the keys to the normal position upon a secondrevolution of said drum, said means consisting of an eccentric diskconnected with the crank handle by a suitable transmission and designedto push back the said racks, and a device for lifting the adding updevice and shifting the same to the right for the length of one toothand returning the same to the original position, substantially asdescribed and shown and for the purpose set forth. In witness whereof Ihave hereunto set my hand in the presence of two witnesses. HUGO CORDT.Witnesses:

R. HoRsTMANN, L. MEYER.

